Sage Accounting Canada

Is it possible to add a new payment method when paying Vendors? If yes, I cannot seem to find where to do so. Thank you in advance for any help! Paula

How can I mark a $0 Sales Invoice as paid? I had to create this invoice to make a line-item adjustment (items were same price) so my invoice comes to $0.00 and is now marked as outstanding and I want to clear it from 'awaiting payment'.